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Pneumatic Tire

a technology of pneumatic tires and tires, applied in the direction of tyre tread bands/patterns, vehicle components, transportation and packaging, etc., can solve the problems of insufficient driving performance on snow-covered road surfaces when traveling straight and cornering, and insufficient driving performance on snow-covered road surfaces. the effect of improving the performance of dry road surfaces, wet road surfaces, and snow-covered road surfaces

Active Publication Date: 2017-10-05
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a type of tire that can improve driving performance on different road surfaces. This includes dry roads, wet roads, and snow-covered roads. The invention can enhance the tire's ability to grip the road, making it easier for the driver to control the vehicle.

Problems solved by technology

The pneumatic tire described in Japanese Patent No. 4905599B has improved steering stability performance and noise performance but driving performance on snow-covered road surfaces is insufficient due to not enough tire width directional grooves being provided in the tread surface.
The pneumatic tire described in Japanese Patent No. 5093880B includes lug grooves that communicate to a main groove at one end and terminate within the land portion at the other end, but driving performance on snow-covered road surfaces when traveling straight and cornering is not sufficient.

Method used

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Examples

Experimental program
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working examples

[0176]In the examples, performance tests for braking performance on wet road surfaces, braking performance on snow-covered road surfaces, and braking performance on dry road surfaces were performed on a plurality of types of pneumatic tires of different specifications.

[0177]In these performance tests, a pneumatic tire having a tire size of 205 / 55R16 91V was assembled on a 16×6.5 JJ regular rim, inflated to the regular internal pressure (200 kPa), and mounted on a test vehicle (1600 cc front-engine front-wheel-drive vehicle).

[0178]The braking performance on wet road surfaces was evaluated by measuring braking distance of the test vehicle from a speed of 100 km / h on a wet road surface test course covered in 1 mm of water. Then, index values based on the measured results were assigned, with the result of Conventional Example 1 being defined as the reference (100). In this evaluation, larger numerical values are preferable.

[0179]The braking performance on snow-covered road surfaces was ...

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Abstract

A pneumatic tire comprises a tread portion which is asymmetric about a tire equatorial plane. The tread portion comprises a first land portion on a vehicle outer side, and a second land portion on a vehicle inner side. The first land portion comprises a circumferential narrow groove extending in a circumferential direction, a plurality of first auxiliary grooves that pass through the circumferential narrow groove and are disposed at periodic intervals in the circumferential direction, first blocks defined by the plurality of first auxiliary grooves, and first narrow grooves that pass through the circumferential narrow groove and are disposed in the first blocks. The second land portion comprises a plurality of second auxiliary grooves disposed at periodic intervals in the circumferential direction, second blocks defined by the plurality of second auxiliary grooves, and second narrow grooves disposed in the second blocks.

Description

TECHNICAL FIELD[0001]The present technology relates to a pneumatic tire.BACKGROUND ART[0002]Pneumatic tires with a tread pattern designed to improve steering stability performance and noise performance are known. Also, pneumatic tires with a tread pattern designed to improve traction performance on snow and ice and suppress uneven wear are known.[0003]For example, the pneumatic tire described in Japanese Patent No. 4905599B is designed to improved steering stability performance and noise performance. The pneumatic tire includes a tread portion provided with at least four circumferential main grooves extending in the tire circumferential direction and a plurality of rib-like land portions defined by the circumferential main grooves. The pneumatic tire further includes an outer side second land portion provided with zigzag narrow grooves that extend in the tire circumferential direction with a zigzag shape and divide the outer side second land portion in the tire width direction, and ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/0302B60C11/0304B60C2011/0353B60C11/1204B60C11/1236B60C11/0306B60C11/1392B60C2011/0346B60C2011/0348B60C2011/036B60C2011/0381B60C2011/1209B60C11/03B60C11/12B60C11/13B60C2011/1295
Inventor SUZUKI, NAOKOTAKEI, HIROMITSU
Owner THE YOKOHAMA RUBBER CO LTD
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